I'm interviewed in this WCCO-TV report "How Easy Is It To Cheat In HOV, MnPASS Lanes?" The report by Frank Vascellaro does a nice job of explaining the enforcement technology used on the I-394 MnPASS lanes. It makes the case for why enforcement and giving people the choice of paying to travel alone on I-394 is better than little enforcement and no MnPASS option on the I-35W HOV lane.
The violation rate on the I-394 high-occupancy vehicle (HOV) lane dropped from 20% to 9% when MnPASS was introduced in May 2005. During the same period, the violation rate on the I-35W HOV lane increased from 23% to 33%. The I-35W HOV lane will be converted to a MnPASS lane this fall and will be extended to downtown Minneapolis when major reconstruction of the Crosstown Commons portion of I-35W is completed next year.